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Rifles, Reloading, Optics, Equipment
Reloading
Interpreting Results 223 Bolt Action
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<blockquote data-quote="Kevin Thomas" data-source="post: 474148" data-attributes="member: 15748"><p>bhoeff,</p><p> </p><p>Trickymisfit mentioned something that I was taking for granted; that you had sufficient twist to shoot the 75s. That'd be a 1x8, maybe a 1x9", a little bit of wiggle room with a buttoned barrel. Assuming you do, no problem. I edon't think you're going to get a great deal more velocity out of this combination, since 2,850 is flirting with a max load already. A slower powder will likely mean you'll run out of room in the case and probably see lower speeds with what you can get in there. Faster powders could lead to pressure issues. Stick with the 4895, Varget or RL-15 range for heavy bullets like this in the 223. They're your best bet for both speed and accuracy. If you're dealing with a factory barrel, and their typically slower twists, a lighter (shorter) bullet is in order.</p><p> </p><p>Yes there is a relationship between pressures and velocity, but it's not linear by any means and can be deceiving. Seen plenty of instances where adding more powder gave <u>lower </u>velocities, and I'll guarantee you, the pressure wasn't going down as the extra powder went in. Don't use this as a sole indicator, but take it in conjunction with others and consdier the sum total of them all.</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 474148, member: 15748"] bhoeff, Trickymisfit mentioned something that I was taking for granted; that you had sufficient twist to shoot the 75s. That'd be a 1x8, maybe a 1x9", a little bit of wiggle room with a buttoned barrel. Assuming you do, no problem. I edon't think you're going to get a great deal more velocity out of this combination, since 2,850 is flirting with a max load already. A slower powder will likely mean you'll run out of room in the case and probably see lower speeds with what you can get in there. Faster powders could lead to pressure issues. Stick with the 4895, Varget or RL-15 range for heavy bullets like this in the 223. They're your best bet for both speed and accuracy. If you're dealing with a factory barrel, and their typically slower twists, a lighter (shorter) bullet is in order. Yes there is a relationship between pressures and velocity, but it's not linear by any means and can be deceiving. Seen plenty of instances where adding more powder gave [U]lower [/U]velocities, and I'll guarantee you, the pressure wasn't going down as the extra powder went in. Don't use this as a sole indicator, but take it in conjunction with others and consdier the sum total of them all. [/QUOTE]
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Interpreting Results 223 Bolt Action
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